Electric heat unit or device.



. PATENTED SEPT. 1 .1908. G. H. WADE.

ELECTRIC HEAT UNIT OR DEVICE.

APPLICATION FILED MAR.

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UNITED S :1

ges,

GEORGE H. WQDE, OF ATLANTA, GEORGIA.

Specification of Letters Patent.

ELECTRIC HEAT UNIT OR DEVICE.

Patented Sept. 1, 1908.

Application filed March 9, 1908. Serial No. 419,988.

To all whom it may concern: 7

Be it known that I, Gnonen H. VADE, a citizen of the United States, residing at Atlanta, in. the county of Fulton and State of Georgia,

have invented certain new and use ful Improvements in Electric Heat Units or Devices; and I do hereby declare the follow-- ing to be a-full, clear, and exact description of the invention, such as will enable others 10 skilled in the art to which ii appertains to make and use the same.

This invention relates to improvements 1n electric heaters and particularly to the units making up such heaters and has for anob'ect v the provision of means that may be fitte to any desired shape for providing a compara- Another object in view is the provision of an electric heater in which the heatmg units are made up from coils or strips of insulating material to which the conductors are secured.

A still further object of the invention is the provision of the insulating heat resisting means arranged to receive an electric con- 2 5 ductor upon one side and to be also arranged in strips that may be wound into any desired shape and yet'provide a series of heated air cells or openings that permit the heat from the conductors to radiate directly from the coil.

A still further object of the invention is the provision of a winding made up of a strip of ribbon of a non-conductor and having formed thereon a winding of material that 1s a conductor of electricity.

Another object of the invention is to pro- 'vide a strip of material carrying an electric conductor and to wind the strip into any desired configuration so that the heat may radiate transversely of the stri and at right angles to the plane of the artice to which the same is secured.

With these and other objects in view the invention comprises certain novel constructions, combinations and arrangements of parts, as will be hereinafter more fully described and claimed.

In the accompanying drawing Figure 1 is a perspective view of a strip of non-conductive material having secured thereto an electric conductor. Fig. 2 is a section through a sad iron showing a heating member formed according to the present invention secured therein certain arts of the sad iron being ines. Fig. 3 is. a section through Fig. 4 on line XX. Fig. 4 is a top face and yet within a short space.

plan view of a heating stove or plate. Fig. 5 is a vertical longitudinal section through a liquid containing receptacle with a coil formed according to the present invention secured thereto. Fig. 6 is atop plan view of a radiator or heater certain )arts being broken away to better disclose t 1e invention. Fig. 7 is a perspective view of a slightly modified form of heater. Fig. 8 is a fragmentary view of the preferred form of conductor. Fig. 8 is a slightly modified form of electric conductor Fig. 8 is a further modified form of heat conductor. Fig. 8 is a still further modified form of heat conductor designed preferably to carry heavier current.

In forming a heating device or unit I provide a strip of non-conductor 1 of any desirable material as for instance asbestos, asbestos paper, mica or other suitable insulating or non-conducting material and secure thereto a conductor 2 which may be of any desired material preferably of nickel, German silver or other metal'of rather high resistance. Iron or other metal could be used but the nickel, German silver, or other metal of high resistance is referable as a greater amount of heat may e obtained from them and usually such metals wear longer and are therefore of considerable advanta e over most other metals but it will be not eistood that any metal may be used within the spirit of the invention.

Wire 1 is preferably formed in a plurality of curves or wave shaped configuratlons 3 as clearly seen in Figs. 1 and 8. In these figures the conductor 2 is made from a wire but other constructions accomplishin substantially the same results may be user for instance those seen in Figs. 8, 8 and 8.

In Fig. 8 a structure is shown in which the resistance is provided by stamping out on a piece of sheet metal a conductor 4 arranged 'in a zigzag formation "for providing a comparatively long travel for the electricity and thereby comparatively large radiating sur- In S a conductor 5 is shown as having been f rmed by stamping and in Fig. 8 a conductor 6 is shown as having been stamped from a piece of sheet metal arranged in a tertuous manner for providing a comparatively long resistance in a comparatively short space. lhis provides a large radiating surface in com act space.

' The COIN. uctors 2, 3, 4, 5, and 6, as the case may be are secured to the fire-resisting and and 13 and connect the same insulating or non-conductor 1 by any desired means and then the strip is wound to the form shown in Fig. l or in various other forms as for instance those shown in Fig. 4. After the conductors 2 have been secured to member 1 the same may be wound in any desired place as for instance the sad iron 7 shown in Fig. 2 for heating the same. When a heating device or unit as seen in Fig. 1 is placed in a sad iron as 7 an insulating strip 8 of any desired material as for instance asbestos is provided for the unit to rest upon. By this arrangement if any of the wires or conductors 2 should become loosened or unfastened from'their various strips the same may be dropped down against the insulator without doing any damage and will not short circuit the device. The ends of the conductors may be connected to any source of power (not shown) and turned on or oil as may be desired. The units as shown in Fig. 1 may be connected up in multiple or series as may seem most desirable under various circun'istances and may be wound or bent back and forth as desired for forming any desired configuration. The heating unit may, if desired, be used in any place and under any circumstances providct the same is protected by some insulating means so as to prevent short circuiting. For instance the device is adapted to heat liquid as shown in Fig. 5'in which a heating device or unit 9 is )ositioned in a receptacle 10 for heating liquid therein. In Fig. 6 the units are arranged in a heating stove or radiator. In constructing and arranging a unit as S) for a heater as 11 shown in Fig. 6 the same may be wound in an ob-' long and then be placed. in position but prelerably I divide the strip 1 contained in conductors 2 into a plurality of short piec is as 122 in multiple to a source of current not shown. Beneath and around these strips 12 and 13 is placed an insulatingboard or plate 14 of any desired material but nothing is placed above these strips so that as the current passes through the conductors and heat is evolved the same will be raised and be projected at right angles to the surface or heater 11. It will be observed that the heat is evolved between two strips of non-comlucting and heat resisting material and below the surface of the strip so that in order to escape the heat is given an initial movement and the movement. is at right angles to the object upon which the unit strip positioned.

in Fig. 7 the unit is divided so that the various strips 1 are tormed into a 'ilurality of short strips 15 and 16 but the conductor [7 is made tmntinuons and uninterrupted from one receiving member or binding post as 18 to another member or binding post as 19 so that current may flow through member 18 through the conductor 17 to memberlt) and from thence back to the source of supply.

'hat 1 claim is 1. An electrical heating unit, comprising a ribbon of insulating and heat resisting material, a wire secured to the side of said ribbon and spacing the folds of said ribbon apart when wound, said wire being formed from material having a high temperature co-etiicicnt.

2. In a device of the character described a heating unit formed with a plurality of layers and an electrical conductor iositioned therebetwecn said layers causing the heat of said electrical conductorto be projected in parallelism with the plane of said layers.

3. In a device of the character described, a heating unit formed with a plurality of layers of mica, and an electrical conductor positioned between said layers said electrical conductors sparing the said layers whereby the heat generated in said electrical conductor will be PI'OjOt'tttl from between said layers.

4. An electrical heating unit comprising a strip of insulating material arranged in successive layers, and a resistance material spacing the insulating strips and arranged to provide openings extending transversely the greater part of the width of the strip.

5. An electrical heating unit comprising a strip of insulating material wound in successive convolutious, and a resistancematerial carried by and spacing the insulating strips and arranged to provide openings extending transversely the greater part of the width of the strips.

6. An electrical heating unit comprising a strip of insulating material, arranged'in successive layers, and a resistance material carricd by and spacing the strips and formed in re versely disposed bends extending substantially the width of the strips.

7. An electrical heating unit comprising a strip ol" insulating material wound in successive convolntions, and a resistance material carried by and sparing the insulating strips and arranged in oppositely disposed bends extending substantially transversely approximately the width of the strip. in testimony whereof I allix my signature in presence of two witnesses.

GEORGE ll. WADE- 'il nesscs:

.l. 'l. llULLEMAN, ll. A. Bouuoxt. 

